Tube-mill.



J. s. WORTH.

TUBE MILL.

APPLICATION FILED DEO.21, 1905.

mam-swan. 11, 1910;

a sings-sum 1.

J'. S VWORTH. TUBE MILL.

APPLICATION FILED 1130.31, 1905. I 946,303. v 7 Patented Jan, 11,1910.

, N -3 SHEETS-SHEET 2.

(E "Q 7 I JOHN S. WORTH, OE COATESVILLE, PENNSYLVANIA, ASSIGNOB. G1 ONE-HALF WILLIAM P. WORTH. 0F COA'IESVILLE. PENN-:EYLVANIA.

TUBEJVIILL.

To (It! whomit may concern:

Be it known that .l. Jenn bl. Won'rii, a citizen of the United States, residing at Coatesville which the following is a specification.

My invention relates to certain improve ments in mills for cold rolling a strip of metal into the form of a tube with lapped edges so that the blank thus produced can be passed through the welding machine and completed.

The main objectv of my invention is to so construct a mill that the tube blank after being formed into an open tube is completed and lapped over a mandrel or ball so as to produce a cylindrical tube with the edges properly lapped.

A further object of the invention is to provide means whereby the several mill housings can be adjusted independentl on a base so that the can be spaced the proper distance apart according to the blank being formed.

A still further object of the invention is to provide nieans by which the plate can be proper-l guided through the mill.

It will be understood that. my invention is particularly adapted for cold rolling a blank into the form of a tube and that the blank after being bent to the proper form is heated and passed through the welding ma.- chine to be completed and the longitudinal rib formed by the overlapping portion of the blank is reduced in this last step.

lleretofbi'e lap tube blanks were heated and drawn through a bell, but by my invention the metal is bent, cold by passii'ig the blank through a series of rolling mills and over a mandrel.

1n the accompanying drawings :l igure l is a plan view oi my improved tube rolling mill; Fig. 2, is a side view; Fig. 5), is a view of a blank showing the different stages in the formation of the tube; Figs. 4, 5, 6, 7, S and t), are sectional views through the difterent rolls of the mill, the blank being taken on the different lines indicated in Fig. 3 of the drawings; Fig. 10, is a sectional view through the last three rolls; Figs. 11 and 12, are views of the rolls shown in Figs. 8 and S); Fig. 13, is a view of the roller guide and support for the rod of the mandrel; Fig. 14. is a sectional View on the line i l--14, Fig. 13-; Fig. 15, is a View of amodi- Specification of Letters Patent. ia tgntj bql J an,

Application filed December 21, 1905.

Pennsylvania. have invented certain Improvements in TtlbO-lvillllS, ot

lower roll c Serial No. 292,856.

lication ot' the last; pair of rolls; Fig. 16, is a view showing a mandrel between two sets of rolls.

In the present instance A, A. are two longitudinal foundation beams which support the. entire structure.

B, B B, ll, B B are independent mill structures, th housings o and 7) of each structure being connected by base portions (1. Each mill structure is suitabl clamped to the beams A and can be adjusted one independently of the other on. said beams when desired.

Mounted in the housings'a-re the two roll shafts E and l and the rolls are mount-ed between the housings if and the gears and o by which the two shafts are geared together are mounted between the housings I). 7). The shaft-s E and l are preferably made in sections coupled together in the ordinary manner so that the rolls can be adjustedloward and from each other. e, r? are adjusting screws for adjusting the upper roll in respect to the lower one and c is a spring mounted on a hooked stud 0-, this stud engages the upper bearing and the spring tends to keep the bearing up against the screw.

On one end oi each mill structure is a bracket 7)" in which is mounted the hub of a bevel pinion (I, and passing through the several bevel pinions is a longitudinal driving shaft 1) which extends the I ll length of the machine and can be driven in any suit able manner. The shalt has a throughout its entire length and the bevel pinions have keys which enter the spline so that While the pinions can be moved longitudinally on the shaft when the mill struc tures are adjusted they must turn with the shaft. On the lower sha'tt ll oi each mill structure is a bevel wheel (7 which meshes with its resp ctive bevel pinion d and on the sha'l't lfi a gear wheel 0 which meshes with a gear wheel f on the upper shaft F of the null, as clearly shown lll Fig. 2 ot the draw i3 is a roller table mounted in "front of the first of the series of rolls so that the blank or skelp to be converted into a tube can be fed correctly to the rolls, The blank is gradually bent from a fiat to a U-shape in the first series oi. rolls and in. the last series of rolls from the ll-shape to the round. The of the first mill ll is slightly spline 6Q enes grooved and the upper roll f as to force the metal against lower roll, bending-the blank as shown in Fig. l. The lower rol of the grooved, as shown in Fig. 5, t roll f is narrower than the roll f, 'tendin to force the central portion of the blank more into a U-shape, as shown in F 5. The lower roll a of the mill B has deep groove and the upper roll is narrow so as to enter this groove and force the blank into the shape shown in Fig. 6. The upp 1 roll f and the lower roll e are booth g ooved shown in Fig. 7, so as to give the bend to form the tube, the edges of the blank being bent in as shown. The lower roll oi the mill B is grooved and the upper roll f is also rooved and has a rib f one edge of the rib is beveled so as to in the scarled edge of the blank while the other edge of the rib forms a positive shoulder against the other edge of the blank rests, ihe groove on this side of the blank being deeper than the one on the opposite side, insuring the proper lapping of the edges or" the tube when presented to the final. pair of ro ls. The rolls 6 and f of the mill. B are sped that the tube will assume a perfectly rouno shape. The tube blank as it passes through liis mill is shaped over a mandrel '5 carried by rod l which is supported in the present insiance from the housing of the mill 13*. The roll f has a groove f which allows for ihe tion of the overlapped portion or" the tube which is rolled down when the two edges the tube are welded together in another ma chine.

Secured to the front of each of the housings, with the exception of the first, is a plate G having bearings y for a roller shaft upon which guide rollers mounted. This plate is slotted at g and the confining bolts are passed through the slots in the plate, by providing the plate with th it can be raised and lowered to adji the rollers in respect to the passes bet-ween the rolls. Carried by plate is a bracket guide G, shown clearly in as gs. l3 and 1-2:, which is adjustably secured to the plate so that it can be raised and lowered respecl to the rollers. The guide braokets G are preferably shaped to conform to 'lhe shape of the blank at the dillerent passes in the rolls.

The shaft G of'the mill l, carr es two flanged rollers spaced a sunicienli tnnce 3 art so that the flanges will engage the edges of the skelp or blank. The shaft (3 of the mill B has two flanged rollers 17 placed closer together than the rollers and the shaft G* of the mill B has two flanged rollers 9*, as indicat in l3 and 14, spaced apart, and d by the shaft G is a bracket l havin an extension bolted to the plate G and attached to this bracket is a red I carrying the mandrel or ball as clearly shown in Fig. 10. The shaft G of the mill l3 has a double flanged roller, as illustrated in Fig. 1, and the shaft G of the mill B has a grooved roll corre sponding somewhat in shape to the roll f of the mill B retaining the two edges of the blank in proper position so as to insure the lap being properly made when the blank is passed between the final pair of rolls.

lVhile l have shown the bracket 1 to which the rod l is attached secured to the third from the last mill, the rod passing through three sets of rolls, the bracket may be secured to any mill desired and instead or the mandrel being mounted only between last pair of rolls 6 and f another man-. drel a may be mounted between the next to the last pair of rolls, as shown in Fig. 16, so that t is blank will be formed around a manin this pass as well as the last. Instead or. the rolls of the last pass as shown W 9 and 12, the rolls may be made down in Fig. 15, the upper roll being groov d to a sullflcient depth to allow the two ages of the blank to properly overlap,

shown in said fi ure.

l blank is prererably scarred before being bent into shape and it will be noticed that, in the present instance, the first three of rolls bend the blank from a flat to a ll-shape and the last three sets of rolls bend :he blank from the-U-shape lo the round.

By my invention 1 am enabled to make an accuraie "cylindrical tube of the lapped type, keep the blank absolutely under control while it is being converted from the [lat to a cylinder, adjust each individual mill without inierfering with the other mills, and, in the event of a breakdown on one mill, can be displaced by a duplicate without dismantling the entire train.

l claim 4 l l. in a machine for rolling a blank having sc rl'ed edges into theform of a tube with overlamoing edges, of a eries of upper and lower rolls, the lower rolls of the series begrooved and lheupper rolls being shaped to enter the grooves of the lower rolls and to bend the tube blank into the form ol a trough, a roll grooved and shaped to receive the scarl'cd edges of the blank and to hold the said blank central, a series of rolls shaped so as to close the lube and allow one edge of the blank to overlap the other, and a nuunlrel mounted between one of said last series of rolls over which the tube is formed.

2. The combination in a tube mill of two longitudinal under cut foundation beams, housings independently mounted on said beams and spaced a given distance apart, for clamping the said housings to the beams so that they can be longitmlinally adjusted, a longitudinal driving shu ll, rolls carried by each set of housings and gearing bevel rolls mounted in each housing,

between'the rolls and the driving shaft, substantially as described.

3. l'he combination in a tube mill, of a foundation, mill housings independently mounted on said foundation, upper and lower rolls mounted in each housing, a driving shaft longitudinally arranged in respect to the mill, a bevel gear wheel mounted on one of the roll shafts of each mill housing, a series of bevel pinions splined to the said driving shaft so that it can slide longitudinally on the shaft but must turn with the shaft, and bearings projecting from each housing carrying the said bevel pinions, the

pinions being geared to their respective bevel wheels, substantially as described.

t. In a machine for bending lapped tubes from seal-fed blanks, of a train of rolls, the first series of the train forming a blank from the Hat to the trough shape, the last series forming the blank from the trough to the lapped tube, the upper roll of the second from the last mill having a rib shaped'to seat the scarfededges of the tube, one out of line with the other, substantially as described.

The combination in a machine for bending lapped tubes from sea-rfed blanks, of a seriesot' rolls arranged to shape a blank from a fiat strip with scarfed edges to a tube with one edge overlapping the other, the upper roll of the last mill having a groove for the rece tion of the overla )ii'n ed e of 1 the tube, with a cylindrical mandrel mountcd between the upper and lower rolls of the so that the rib formed by the said last mill lapping will be only on the exterior of the tube, substantially as described.

(5. The combination in a tube bending mill, of a series of mill housings, upper and lower cured to each housing, each plate, guide rollers mounted on the said shafts, a bracket guide also mounted on the a plate sea shaft carried by l l l I l l l l l l l l l r l l apart, a bracket mounted plate below the rollers so that the blankas it passes from one mill to the other will be guided by the rollers and the bracket, sub- 8. The combination in a tube bending mill,

of a series of mill housings, upper and lower rolls carried by each housing, guide rolls secured to the housings, shafts having bearing carried by the said housings, a bracket mounted on'one of the said shafts, a rod secured to the bracket, and a mandrel secured to the rod and mounted between a pair of the above mentioned rolls, substantially as described.

9. The combination in a tube bending mill, of a series of mill housings, upper and lower rolls mounted in each housing, a plate secured to each of said housings with the exception of the first, shafts carried by the said plate, guide rollers mounted on the said shafts,- one set of guide rollers being spaced on the shaft between the said rollers and having an extension secured to the plate, a rod carried bythe said bracket between the rolls, and a mandrel on substantially'as described.

In testimony whereof, I have signed my name to this specificatiom in the presence of two subscribing Witnesses.

' JOHN S. \VORIII.

the rod,

and extending rearwardly 

